116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/* Print output of stream to given obstack.
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Copyright (C) 1996-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdlib.h>
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#include <libioP.h>
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#include "../libio/strfile.h"
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#include <assert.h>
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#include <string.h>
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#include <errno.h>
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#include <obstack.h>
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#include <stdarg.h>
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#include <stdio_ext.h>
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struct _IO_obstack_file
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{
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struct _IO_FILE_plus file;
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struct obstack *obstack;
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};
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extern const struct _IO_jump_t _IO_obstack_jumps attribute_hidden;
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int
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__obstack_vprintf_chk (struct obstack *obstack, int flags, const char *format,
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va_list args)
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{
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struct obstack_FILE
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{
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struct _IO_obstack_file ofile;
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} new_f;
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int result;
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int size;
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int room;
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#ifdef _IO_MTSAFE_IO
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new_f.ofile.file.file._lock = NULL;
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#endif
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_IO_no_init (&new_f.ofile.file.file, _IO_USER_LOCK, -1, NULL, NULL);
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_IO_JUMPS (&new_f.ofile.file) = &_IO_obstack_jumps;
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room = obstack_room (obstack);
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size = obstack_object_size (obstack) + room;
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if (size == 0)
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{
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/* We have to handle the allocation a bit different since the
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`_IO_str_init_static' function would handle a size of zero
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different from what we expect. */
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/* Get more memory. */
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obstack_make_room (obstack, 64);
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/* Recompute how much room we have. */
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room = obstack_room (obstack);
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size = room;
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assert (size != 0);
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}
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_IO_str_init_static_internal ((struct _IO_strfile_ *) &new_f.ofile,
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obstack_base (obstack),
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size, obstack_next_free (obstack));
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/* Now allocate the rest of the current chunk. */
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assert (size == (new_f.ofile.file.file._IO_write_end
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- new_f.ofile.file.file._IO_write_base));
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assert (new_f.ofile.file.file._IO_write_ptr
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== (new_f.ofile.file.file._IO_write_base
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+ obstack_object_size (obstack)));
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obstack_blank_fast (obstack, room);
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new_f.ofile.obstack = obstack;
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/* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
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can only come from read-only format strings. */
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if (flags > 0)
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new_f.ofile.file.file._flags2 |= _IO_FLAGS2_FORTIFY;
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result = _IO_vfprintf (&new_f.ofile.file.file, format, args);
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/* Shrink the buffer to the space we really currently need. */
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obstack_blank_fast (obstack, (new_f.ofile.file.file._IO_write_ptr
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- new_f.ofile.file.file._IO_write_end));
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return result;
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}
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libc_hidden_def (__obstack_vprintf_chk)
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int
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__obstack_printf_chk (struct obstack *obstack, int flags, const char *format,
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...)
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{
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int result;
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va_list ap;
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va_start (ap, format);
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result = __obstack_vprintf_chk (obstack, flags, format, ap);
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va_end (ap);
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return result;
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}
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